Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Registro completo
Provedor de dados:  ArchiMer
País:  France
Título:  Impacts of oil spills on altimeter waveforms and radar backscatter cross-section
Autores:  Cheng, Yongcun
Tournadre, Jean
Li, Xiaofeng
Xu, Qing
Chapron, Bertrand
Data:  2017-05
Ano:  2017
Palavras-chave:  Oil spill
Altimeter
Sigma0 bloom
Waveform
Resumo:  Ocean surface films can damp short capillary-gravity waves, reduce the surface mean square slope, and induce “sigma0 blooms” in satellite altimeter data. No study has ascertained the effect of such film on altimeter measurements due to lack of film data. The availability of Environmental Response Management Application (ERMA) oil cover, daily oil spill extent and thickness data acquired during the Deepwater Horizon (DWH) oil spill accident provides a unique opportunity to evaluate the impact of surface film on altimeter data. In this study, the Jason-1/2 passes nearest to the DWH platform are analyzed to understand the waveform distortion caused by the spill as well as the variation of σ0 as a function of oil thickness, wind speed and radar band. Jason-1/2 Ku-band σ0 increased by 10 dB at low wind speed (<3 m.s-1) in the oil-covered area. The mean σ0 in Ku and C bands increased by 1.0 - 3.5 dB for thick oil and 0.9 - 2.9 dB for thin oil while the waveforms are strongly distorted. As the wind increases up to 6 m.s-1, the mean σ0 bloom and waveform distortion in both Ku and C bands weakened for both thick and thin oil. When wind exceeds 6 m.s-1, only does the σ0 in Ku band slightly increase by 0.2 - 0.5 dB for thick oil. The study shows that high-resolution altimeter data can certainly help better evaluate the thickness of oil spill, particularly at low wind speeds.
Tipo:  Text
Idioma:  Inglês
Identificador:  http://archimer.ifremer.fr/doc/00381/49203/49635.pdf

DOI:10.1002/2016JC012568

http://archimer.ifremer.fr/doc/00381/49203/
Editor:  Amer Geophysical Union
Formato:  application/pdf
Fonte:  Journal Of Geophysical Research-oceans (2169-9275) (Amer Geophysical Union), 2017-05 , Vol. 122 , N. 5 , P. 3621-3637
Direitos:  2017. American Geophysical Union. All Rights Reserved.

info:eu-repo/semantics/openAccess

restricted use
Fechar
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional